package com.sky.mapper;

import com.sky.entity.ShoppingCart;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Update;

import java.util.List;

@Mapper
public interface ShoppingCartMapper {

    List<ShoppingCart> list(ShoppingCart shoppingCart);

    /**
     * 查询购物车数据
     * @param shoppingCart
     * @return
     */
    ShoppingCart getByShoppingCart(ShoppingCart shoppingCart);

    /**
     * 更新商品数量
     * @param shoppingCart
     */
    @Update("update sky_take_out.shopping_cart set number=#{number} where id=#{id}")
    void updateNumberById(ShoppingCart shoppingCart);


    /**
     * 插入购物车数据
     *
     * @param shoppingCart
     */
    @Insert("insert into sky_take_out.shopping_cart (name, user_id, dish_id, setmeal_id, dish_flavor," +
            " number, amount, image, create_time) " +
            " values (#{name},#{userId},#{dishId},#{setmealId}," +
            "#{dishFlavor},#{number},#{amount},#{image},#{createTime})")
    void insert(ShoppingCart shoppingCart);

    /**
     * 根据用户id清空购物车
     * @param userId
     */
    @Delete("delete from sky_take_out.shopping_cart where user_id=#{userId}")
    void deleteByUserId(Long userId);

    /**
     * 删除购物车中的一个商品,当商品数量为1时
     * @param cart
     */
    void updateNumber(ShoppingCart cart);

    /**
     * 减少购物车中的一个商品的数目
     * @param cart
     */
    void deleteNumber(ShoppingCart cart);
}
